I love the songs in the game and eveybody looks so cute! My only issues are with the note sync (and speed) and the characters actually being related to real-world killers :(
My personal suggestions are adding a wider variety of note speeds (there are people who like it really fast lolol) and a note callibration in future updates :D
And also you could give the characters more original names so people won't get too squicky at it :p
But overall 7/10! Looking forward to seeing the whole thing!